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A tunable hybrid metamaterial absorber based on vanadium oxide films

2012; Institute of Physics; Volume: 45; Issue: 23 Linguagem: Inglês

10.1088/0022-3727/45/23/235106

1361-6463

Qiye Wen, Huaiwu Zhang, Qinghui Yang, Zhi Chen, Yang Long, Yulan Jing, Yuan Lin, Peixin Zhang,

Antenna Design and Analysis

Abstract A tunable hybrid metamaterial absorber (MA) in the microwave band was designed, fabricated and characterized. The hybrid MA was realized by incorporating a VO 2 film into the conventional resonant MA. By thermally triggering the insulator–metal phase transition of the VO 2 film, the impedance match condition was broken and a deep amplitude modulation of about 63.3% to the electromagnetic wave absorption was achieved. A moderate blue-shift of the resonance frequency was observed which is promising for practical applications. This VO 2 -based MA exhibits many advantages such as strong tunability, frequency agility, simple fabrication and ease of scaling to the terahertz band.